"Page Not Found" in breadcrumb if page contains a missing image

I noticed that I had an image missing that was being called on by my css (Background image) and instad of the breadcrumb displaying the page title it displayed "Page not found"

Steps to reproduce:

1) Change a stylesheet to reference a background image that doesn't exist
2) Click around and watch the clickpath module (Overriding breadcrumbs) display page not found.